Philips PRM80 Series User Manual

PHILIPS
PRM80 SERIES VHF/UHF MOBILE
RADIO TELEPHONE
WARNING
The transistors used in the transmitter power amplifier contain beryllium
oxide, the dust of which Is toxic.
No danger can arise from normal handling, but no attempt should be
made to tamper with the encapsulation of these devices. They must not
be discarded with Industrial or domestic waste.
Publication Ref. 9585 666 80000
Issue B. - November, 1989.
This handbook Is for the maintenance of telecommunication equipment. The performance
figures quoted are typical and are subject to normal manufacturing and service tolerances.
The right Is reserved to alter the equipment or specifications In the light of technical
development.
This publication Is copyright and no part may be reproduced or copied without the prior
permission of Philips Radio Communication Systems (Australia) .
Philips Radio Communication Systems
Box 105, Clayton, Victoria, Australia, 3168. Telephone: (03) 542 4500
Telex: AA20165 (PHILIND) AUSCLTW+ FAX: (03) 543 7935
Printed
in

Philips PRM80 Series Specifications

General

Output Power	5W
Frequency Range	400-470 MHz
Channel Spacing	12.5 / 25 kHz
RF Output Power	5 W
Receiver Sensitivity	0.25 μV (12 dB SINAD)

Summary

PRM80 Series Introduction and Safety

Safety Warning: Beryllium Oxide Hazard

Warning about toxic beryllium oxide in transistors and safe handling.

General Product Information and Contact

Covers disclaimers, copyright, and manufacturer contact details.

Section 1: Introduction to the PRM80 Series

Product Description and Variants

Details PRM80 series features, variants, and product family.

Mechanical Construction and Serviceability

Describes physical build and access for maintenance.

Sales Codes Explained

Details the 12-digit sales code and 20-digit technical code.

Operating Instructions

Covers safety, advice, functions, scanning, selcall, and alert tones.

Safety First and User Advice

Essential safety guidelines and operating tips for users.

Common Functions and Facilities

Explains basic operations like switching, speech reception, and transmission.

Other Functions and Features

Covers transmit inhibit, timers, lockout, CTCSS, and microphone cradle operation.

Scanning and Selective Call Functions

Details scanning operation, priority channels, and various selcall features.

Alert Tones and Data Sheet

Describes alert tone types and the equipment data sheet information.

Section 2: Technical Specifications

General Specifications

Covers operation, frequency bands, channel spacing, stability, bandwidth, capacity, and compliance.

Receiver Specifications

Details sensitivity, selectivity, rejection ratios, blocking, modulation, radiation, and audio performance.

Transmitter Specifications

Covers power output, emissions, noise, microphone sensitivity, and audio distortion.

Signalling System Specifications

Details Selcall and CTCSS encoder/decoder parameters and performance.

Section 3: Technical Description

Overall System Architecture

Overview of the transceiver's main boards and block diagram.

Receiver System Description

Detailed explanation of receiver front end, IF section, and audio processing.

Transmitter System Description

Detailed explanation of power amplifier and audio processing.

Synthesizer and Control Systems

Describes synthesizer operation, microprocessor control, power supply, and interfaces.

Synthesizer Operation and Components

Explains PLL synthesizer, VCOs, oscillators, and dividers.

Microprocessor Control and Interfaces

Details microprocessor functions, power supply, and serial bus communication.

Front Panel and Keyboard Operation

Describes the front panel layout, display, and button functions for different models.

Section 4: Alignment Procedure

Test Equipment and General Instructions

Lists required test gear and general guidelines for alignment.

Preliminary Adjustments

Initial steps before starting detailed alignment procedures.

Test Frequency Table

Provides frequency settings for various tests across different bands.

Detailed Alignment Procedures

Step-by-step guide for aligning VCOs, power, oscillators, and modulation.

VCO and Transmitter Power Alignment

Procedures for aligning voltage controlled oscillators and transmitter power output.

Receiver Front End and Mute Alignment

Steps for aligning receiver front end stages and mute function.

Modulation Alignment

Procedures for adjusting transmit modulation without CTCSS, with CTCSS, and with Selcall.

Section 5: Installation Instructions

General Installation Information

Covers operator access, location safety, and vehicle considerations.

Main Unit Fitment and Mounting

Details how to install the transceiver unit, cradle, and microphone.

Antenna and DC Supply Connection

Instructions for antenna mounting and connecting the DC power supply.